package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.FlavorMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * @author : 黑渊白花
 * @ClassName DishServiceImpl
 * @date : 2024/2/26 22:14
 * @Description
 */

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private FlavorMapper flavorMapper;
    @Autowired
    private SetmealMapper setmealMapper;


    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> dishPage = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(dishPage.getTotal(),dishPage.getResult());
    }

    /**
     * 新增菜品和对应的口味
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        Long id = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null &&flavors.size() > 0){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(id);
            }
            flavorMapper.insertBatch(flavors);
        }
    }

    /**
     *
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品表基本信息
        dishMapper.update(dish);
        //口味先删除再添加
        dishMapper.deleteById(dishDTO.getId());
        //重新原来的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null &&flavors.size() > 0){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishDTO.getId());
            }
            flavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 根据菜品id查询
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        DishVO dishVOList = dishMapper.getByIdWithFlavor(id);
        return dishVOList;
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        if (ids == null || ids.isEmpty()) {
            return;
        }
        //判断当前是否能够删除---是否存在起售中的菜品(黑马编写)
        // for (Long id : ids){
        //     Dish dish = dishMapper.getByid(id);
        //     if (dish.getStatus() == StatusConstant.ENABLE){
        //         throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
        //     }
        // }
        //直接根据ids找到所有status=1的数据，判断长度即可（自己实现）
        int sellingCount = dishMapper.countSellingDishes(ids);
        if (sellingCount > 0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
        }
        //判断当前是否能够删除---是否存在套餐关联（setmeal_dish）
        List<Long> setmealIds = setmealMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的菜品数据
        dishMapper.deleteByIds(ids);
        //删除菜品关联的口味中的菜品数据
        flavorMapper.batchDeleteByDishIds(ids);

    }

    @Override
    public void statusChange(Integer status, Long id) {
        Dish dish=Dish.builder()
                .status(status).id(id)
                .build();
        dishMapper.update(dish);
    }

    @Override
    public List<Dish> getByCategoryId(Long categoryId) {
        return  dishMapper.getByCategoryId(categoryId);
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = flavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


}
